* {
    margin: 0;
    padding: 0;
    list-style: none;
    box-sizing: border-box;
}

.mask {
    width: 100%;
    height: 100%;
    position: fixed;
    left: 0;
    top: 0;
    background: #333333;
}

.content {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: #fff;
    width:400px;
    padding:10px;
}

h1{
    text-align: center;
}

.bottom{
    text-align: center;
}

p{
    height:36px;
    margin: 6px 0;
    line-height: 36px;
}

p b{
    width:100px;
    display: inline-block;
    text-align: right;
}

p input{
    height: 30px;
    width:220px;
}

.login{
    width:60px;
    height:36px;
}


p span{
    color:red;
    font-size: 12px;
}
